Mains Protection And Electromag- Netic Compatibility; Settings; Installation For Constant Pressure Operation - Pentax IPFC 109 Manual De Instrucciones

6. Mains protection and elec-
tromagnetic compatibility
The device is equipped with a 16 A delayed fuse (6.3 x 32
mm), as per standard.
The mains protection devices required upstream the device
depend on the type of installation and local standards. We
recommend using a circuit breaker protection with charac-
teristic curve of type C and differential switch of type A.
Comply with the following provisions to guarantee electro-
magnetic compatibility (EMC) of the system:
•
always connect the device to earth.
•
if required, use shielded signal cables
earthing the shield to one end only.
•
install signal cables, motor cables and power
supply separately.
•
use motor cables as short as possible (< 1
m).
We recommend installing an additional inlet filter for particu-
larly sensitive installation environments. (Available upon
request).

7. Settings

PWM regulation and nominal Hz of the motor via dip-
switch.
The dip-switch allows you to vary:
•
Modulation frequency (PWM):
•
8 kHz : suitable for device application on
board the motor.
•
2.5 kHz: suitable for wall-mounted application
of the device and motor cables longer than 10
m.
Nominal frequency of the applied motor (50 Hz or 60 Hz).
Attention: the 50 Hz setting with 60 Hz nominal frequency
motor may reduce the provided performance. The 60 Hz
setting with 50 Hz nominal frequency motor may produce
motor overload and trigger an overload alarm.
Regulation of the maximum motor current threshold
and P.F. (power factor or cosØ) threshold of dry opera-
tion.
The Imot trimmers and P.F. allow you to adjust the two
alarm thresholds:
•
maximum motor current threshold: when this
value is exceeded, the device stops the load and triggers an
over-current alarm. We recommend setting a maximum
motor current threshold equal to the nominal current of the
motor increased by 10%.
•
P.F. threshold of dry operation: under this value,
the device stops the load and triggers the dry operation
alarm.
After 5 minutes from the stop, the device will attempt an
automatic restart. In the event the attempt triggers an addi-
tional dry operation alarm, the pump stops for another 10
minutes before another attempt is carried out. Similarly, the
attempts will be repeated automatically after 20, 40, 80 min-
utes. In the event all 5 attempts fail to restore the alarm, the
device will stop the pump definitely. Therefore, to restore
the operation, you must deactivate and activate the device
manually.
To adjust the trimmer position correctly, we recommend
referring to the indication below.
Generally, the P.F. value of the dry operation may vary be-
tween 60% and 70% compared to the nominal P.F. value of
the pump.
8. Installation for constant
pressure operation
The EPIC can manage the rotation speed of the pump in
order to maintain pressure constant in a point of the system
according to the water request variation of the utility.
The basic diagram of a pumping line that performs this op-
eration is the following:
EPIC
1
1. pump
2. check valve
3. expansion tank
3
4
5
2
6
7